Adjustable crank.



No. 7||,724. Patented Oct. 2|, 1902.

- H. JANSSEN.

ADJUSTABLE CRANK.

: App1ication filed June 10. 1002.:

(No Model.)

M .r. I

HENRY JANSSEN, or WYOMISSING, NEAR READING, PENNSYLVANIA, AS-

PATENT OFFICE.

SIGNOR TO TEXTILE MACHINE WORKS, OF READING, PENNSYLVANIA,

INCORPORATED.

ADJUSTABLE CRAN K.

SPECIFICATION :tbrming part of Letters Patent No.71 1,724, dated October21, 1902.

Application filed Tune 10. 1902. Serial No. 110,951. (No model.)

To all whom it mdy concern:

Be it known that I, HENRY J ANSSEN, a citizen of the United States ofAmerica, and a resident of Wyomissin g, near Reading, in the county ofBerks and State of Pennsylvania, have invented certain new and usefulImprovements in Adjustable Cranks, of which the following is aspecification.

Myinvention relates to an improved crank designed particularly forimparting nicely-adjusted movement to connected parts from anoscillating shaft to which the crank is rigidly fixed-as, for instance,in certain knittingmachines in which the needles require to be raisedand lowered into exact cooperating position with other parts. 7

My object is to provide for conveniently securing and maintaining suchexact adjustment of movement from any number of cranks on theoperating-shaft without requiring nicety in the securing of the cranksthereon and without change in the character of the resulting movement.

The invention is fully described in connection with the accompanyingdrawings, and the novel features are pointed out in the claims.

Figure 1 is an elevation, and Fig. 2 a plan View, of a preferred form ofcrank embodying my invention. Fig. 3 shows a slightly-modifiedconstruction.

The shaft hub or boss A of the crank is formed, as shown in Figs. 1 and2, with an integral bifurcated arm or web B O, the portion B of whichconstitutes a rigid unyielding extension from the hub, while the portion0 is so formed as to be readily bent toward the rigid portion B by meansof a clampingbolt D, which adj ustably connects the two portions at apoint adjacent to their outer ends, as shown, thus swinging theconnection end 0 of the crank, which is formed at the outer extremity ofthe yielding arm portion 0, approximately in an are N around thehubaxis. The normal space between the portions formed by thelongitudinal slot 3 permits of a limited movement, giving suflicientscope for adjustment of the operating connectingand without changing thethrow of the crank. A

Thus the crank may be permanently secured to the shaft F in merelyapproximately correct position, and the mechanism carried by theconnecting-rod E be thereafter accurately adjusted with quickness andcase, which is often a matter of considerable importance.

The clamping means provided for adjustably securing the two separatedportions of the crank preferably consists, as shown, of a two-part boltD D, the main part D of which is screw-threaded into the adjustablecrank portion and has its lower end adj ustably seated against the rigidcrank portion,while the locking part D passes loosely through said rigidcrank portion and is screw-threaded into the main part D, thus rigidlyuniting the two crank portions in adjusted position.

In the slightly-modified construction indicated in Fig. 3 the yieldingarm member 0 instead of forming an integral extension of the shaft-hubhas its inner end pivotally supported in connection therewith at 0',thus permitting of considerable adjusting movement of its outerconnecting-rod end 0 by means of suitable clamping means connecting itto the rigid arm member B. The construction may evidently be otherwisemodified.

What I claim is 1. A crank having an arm comprising one.

member forming a rigid extension from the shaft-hub and another memberprovided with a rod-connecting pivot and secured to said rigid member soas to provide for arcual adjustment of said rod-connectiug pivotrelative to the hub.

2. An integrally-formed crank having a bifurcated arm or web one memberof which forms a rigid and the other a yielding extension from the hub,said'yielding member being provided with a connectionend and adjustablyfixed to the rigid member to vary the arcual position of said endrelative to the hub.

3. An integrally-formed crank having a bifnrcated arm or web one memberof which forms a rigid and the other a yielding extension from the hub,said yielding member being provided with a connection end and adjustableclamping means adjacent to said connection end comprising an adjustablescrew for regulating the spread of the crank members and aclamping-screw for locking the latter in adjusted relation,substantially as set forth. 1o

Signed at Reading, Pennsylvania, this 5th day of June, 1902.

HENRY JANSSEN. Witnesses: v

D. M. STEWART, W. G. STEWART.

